Find a number to replace the question mark so that the given fractions are equivalent.
= 
A. 7
B. 21
C. 14
D. 12
Answer: D
Mathematics
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Solve.9x + 3 = 8x + 5
A. 
B. 
C. 4
D. 2
Mathematics
Find the mean. Round to the nearest tenth unless otherwise stated.Scores on an aptitude test: 615, 519, 354, 352, 592, 356, 355, 525, 470, 482
A. 452.9 B. 471.4 C. 462.0 D. 476.0
Mathematics
Find the inverse of the matrix.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics
Find the exact value of the expression using a sum, difference, or double-angle identity.2 sin 
cos 
A. - 
B. 
C. - 
D. 
Mathematics